Interesting topic. As mentioned, this is a reprise of other threads. It seems to be one of the difficulties of discussion threads, they can be hard to find once they have gone dormant, and there’s a lot of ideas and discussion on this forum.
My 2 ¢…
In a previous thread it’s been mentioned that there’s a YouTube video, titled “Stored homemade natural wood gas”, where the fellow demonstrates long term storage of compressed wood gas, at fairly low pressure.
From what I have read, and probably corroborated by what Chris has posted, though theoretically carbon monoxide degrades, at lower pressures and ambient temperatures, that probably isn’t a significant factor.
Regarding Cory’s mention of nitrogen being a dilutant, if this is retort gas we are talking about, it’s a different animal in composition, being the decomposition products of heated wood, having a distinct, and more energetic composition. Granted, a good part of the energy from retort gas will likely be in the form of tars, unless they can be catalyzed, or they may be best condensed and collected as so called “biocrude”.
Carbon monoxide isn’t efficiently compressed, and neither is methane, another component of retort and gasifier gas. It’s a losing proposition to put energy into compressing such a gas.
The engineers who set up town gas systems in the Victorian era did it right, high volume, low pressure storage.
David votes for direct use, and the simplicity of that approach. I feel that stationary power, and possibly water heating etc might be a significant niche for gas storage. To me it seems attractive to have a reliable fuel supply on tap for things that propane would be good for, occasional intermittent use, or with enough volume, even many hours of generator running.
If a person is making charcoal, there will be significant waste energy, my intuition figures that one barrel of wood in a retort might produce enough gas to pyrolize 2 barrels. If a person is involved in making charcoal, this is a major wasted potential energy source, so it’s really a different mindset and approach from direct wood gasification.
My vision: high volume, low pressure storage. Ideally, a gas bag inside a rigid container, like a grain bin, or silage silo, same system as the old gasometers, deck floating on top of the bag to provide the 2 or 3 psi. Smaller scale would have some utility, but if pyrolizing barrel volumes of wood, large volumes of not very energy dense gas would result.
Any indoor use calls for a good CO meter (or two), a lot of caution, and working to a gas fitters standards.
Garry Tait, Manitoba